Avoid using [object Object] for previews

[Balastrong]

From microsoft/vscode#155718

Issue Type: Bug

Development environment is an angular workspace

Since VS Code Update 1.69.x debug information are not properly shown. All objects are displayed as [object Object]. (see screenshots to compare Versions)

Steps to reproduce: Debug any Angular component After breakpoints hits, hover a variable or put it in watch

// Edit: it still occurs in 1.69.2

Version 1.68.1 Version 1.69.1

VS Code version: Code 1.68.1 (30d9c6c, 2022-06-14T12:48:58.283Z) OS version: Windows_NT x64 10.0.17763 Restricted Mode: No

System Info
Extensions (31)